21010299 has 8 divisors (see below), whose sum is σ = 28169232. Its totient is φ = 13929120.

The previous prime is 21010271. The next prime is 21010307. The reversal of 21010299 is 99201012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21010299 - 2¹⁵ = 20977531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21010229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18804 + ... + 19889.

It is an arithmetic number, because the mean of its divisors is an integer number (3521154).

Almost surely, 2^21010299 is an apocalyptic number.

21010299 is a deficient number, since it is larger than the sum of its proper divisors (7158933).

21010299 is a wasteful number, since it uses less digits than its factorization.

21010299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38877.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 21010299 is about 4583.6992702401. The cubic root of 21010299 is about 275.9375121085.

The spelling of 21010299 in words is "twenty-one million, ten thousand, two hundred ninety-nine".